4
❖
NEVER place a cold glass vessel onto a hotplate
which is already hot.
❖
NEVER use a retort rod longer than 600mm.
❖
When a retort rod is installed with apparatus
attached, or when swivelling support rods, take
care that there is sufficient weight on the plate
to prevent the whole unit tipping over.
❖
When using a retort stand, in order to provide
the unit with adequate ventilation the base of
the retort stand must NOT exceed 19.5 mm in
height and 125 mm in width.
Operation
Heating
UC150, UC152, US150, US152
Switch the unit on using the mains on/off switch
(see figure 2).
The control knob labelled “HEAT” on the front
panel controls the heat output and hence the
plate temperature. It is graduated with an
approximate temperature scale. This scale refers
to the temperature of the top plate and not to
the temperature of the contents of the vessel
being heated.
Turn the control knob clockwise to the required
plate temperature. As the plate heats up the LED
temperature segments around the dial will light
up in turn and their light intensity increase until
the set surface temperature is reached.
Conversely if the unit is cooling, the LED
temperature segments will go out as the plate
approaches the set temperature.
UC152D, US152D
Switch the unit on using the mains on/off switch
(see Figure 2). When the control knob labelled
“HEAT” is pointing to the Power on/off position,
the LED display will show the word “OFF”. Turn
the control knob to the required temperature
which will be shown on the LED display. The
temperature will increment in 5°C steps. A few
seconds after setting the temperature, the display
will revert to showing the actual temperature of
the hotplate.
If the unit is switched off using the mains on/off
switch while the control is in a set position, the
next time the unit is switched on the LED display
will show the word “On” followed briefly by the
previously set temperature. The display will then
revert to the actual top plate temperature and
the unit will then begin to heat to the set
temperature.
WARNING:
When the surface becomes
too hot to touch the red "HOT" warning
light on the front panel will begin to flash (see
figure 1). This will continue to flash while the
plate temperature is above 50°C for a maximum
of 30 minutes, even if the unit is disconnected
from the electricity supply.
WARNING:
The plate may still be hot
beyond 30 minutes when large masses are
left on the plate, even though the "HOT"
warning light has gone out.
WARNING:
The top surface of the
instrument may be
HOT,
especially in free
air when a surface temperature of 450°C can be
achieved on the ceramic top models and 325°C
on the metal top models. Do not leave heaters
switched on when not in use.
Stirring
UC151, UC152, UC152D, US151, US152,
US152D
Switch the unit on using the mains on/off switch
(see figure 2). The control knob labelled “STIR”
on the front panel controls the stirrer speed.
When switched on a green stir-on light
illuminates, (see figure 1). The knob is graduated
with an arbitrary 1-9 scale. Turning the knob to a
higher number increases the stirrer speed.
Using the Optional Accessory SCT1
Temperature Controller
UC151, UC152, UC152D, US151, US152,
US152D
The SCT1 temperature controller allows accurate
temperature control of aqueous and oil based
h e a t - s t i r
US152
HOT
1
2
3
4
5
6
7
8
9
STIR
u n d e r g r a d
off
Power
on/off
100
150
250
200
300°C
50
HEAT
Power
on/off
100
150
250
200
300°C
50
HEAT
